From Greek: para allelois beside one another. Lines are parallel if they lie in the same plane, and are the same distance apart over their entire length. Try this Drag any orange dot at the points P or Q. As the line PQ moves, the line RS will remain parallel to it. Parallel lines remain the same distance apart over their entire length.
It is important to know whether the cancer has got into the lymph glands because they are one of the main mechanisms by which the cancer can spread to other parts of the body. As long as the spread is just to the lymph glands near to the colon then this would indicate Stage 3 cancer.
Does a swollen lymph node in the lung area always mean cancer? A: Swollen lymph nodes in the lung or chest area do not always mean cancer. Although some cancers may result in swollen lymph nodes, they may also signal infection, injury, illness or a tumor, states WebMD. Continue Reading.